A few weeks of practicing 10 minutes a day or so will give you good handwriting.
A few weeks of a basic drawing course with a small amount of practice will give you decent enough skills to get your ideas down on paper.
People naturally do the things they like to do. I actually enjoy the process of writing with fountain pens, calligraphy, taking notes, etc. Strangely, I also really enjoy the experience of typing.
Taking notes and drawing don't make me cool. Carrying a notebook and a fountain pen made people think I was kind of eccentric more than anything. Carrying an iPad Pro 12.9 with a stylus made people think I was a geek. No one was mean about it or anything, but it definitely doesn't make a person cool. Just be who you are and do the things you enjoy.
If you think you would enjoy writing/drawing, put a little bit of effort into it and you will have pretty good results.
As far as the e-ink tablets go, I'm hoping the large format ones become more affordable and more polished. I would love to have one but the value proposition vs an Ipad is terrible. Single-purpose devices can frequently be better than a more generalized device, but in the case of these E-ink tablets the few things they do (reading, writing, drawing) generally offer a worse experience than doing that same thing on an Ipad. The only upsides are battery life and the e-ink screen.